Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/0Ak1gpz/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34971131/LNXgb8A",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b357510d-4a69-4eb7-9436-ed4864e1ebd9",
      "cw-acb68e76-3a0f-495d-b21e-837d047f1cc0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1614e5ed-6b9f-408a-b091-5d0183070b61",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/0Ak1gpz/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-acb68e76-3a0f-495d-b21e-837d047f1cc0",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}